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Learn how to perform the cylinder leak down test for precise engine diagnostics and troubleshooting with autozone. Veteran engine builder wayne scraba will explain what a leakdown test does and how to perform on on your engine. What is a leak down test
A leak down test is a method of using compressed air and a specialized gauge set that reads differential pressure to evaluate the condition of an engine's cylinders, pistons and rings, and valves and seats without disassembling the engine. The goal of completing a leak down test is to determine what percentage of compression is lost within the cylinder. Before you tear down the engine, pinpoint where problems are by using these three steps to do an engine leakdown test.
How to perform a cylinder leakdown test mastering cylinder leakdown testing
Pinpointing compression loss like a pro if you've ever run a compression test and found one or more cylinders reading lower than the rest, you know there's a problem But a compression test can't tell you why the cylinder is losing pressure. Disconnect the gauge and move to the next cylinder See tools needed, testing procedures, and how to interpret results on repairpal.
A cylinder leak down test, can tell you if the loss of compression is from, worn rings, burned or stuck open valves or a leaking head gasket. A cylinder leak down test determines if the engine can hold pressure, which is necessary for proper and efficient combustion
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